Shaanxi Automobile Group Co., Ltd. (Shaanxi Group) and United States Cummins Corporation have worked together for three years and successfully developed the National IV standard heavy truck, making Shaanxi Automobile Group the only company in China that currently has a mature state quadruple card technology. On the 19th, Shaanxi Automobile Cummins' four heavy trucks were listed in Xi'an for the first time, indicating that China's national standard heavy trucks have been put into the market for the first time in batches.
In recent years, the exhaust emission standards of China's autos have risen year by year. On July 1, 2004, the National II emission standards began to be implemented nationwide. On July 1, 2007, the National III emission standards were implemented nationwide. The Shaanxi Automobile Group and the United States Cummins Corporation jointly launched the national quadruple heavy truck, which means that China has made great breakthroughs in the fourth technology of heavy commercial vehicles.
Dr. Li Hongyan, vice president of Shaanxi Heavy Duty Truck Automotive Research Institute, said that Shaanxi Automobile's Cummins IV technology platform has been very mature and reliable. Compared with previous vehicles, it has more energy-saving, environmental protection, smart savings, aesthetic comfort, reliable safety, etc. Many advantages. Taking energy conservation as an example, the national quadruped card is 5-11% lower than the national triple card in terms of fuel consumption.
Tang Dagang, director of the Vehicle Pollution Control Center of the Ministry of Environmental Protection of the People's Republic of China, spoke highly of the environmental protection of the four standard heavy trucks of Shaanxi Steam Cummins. He said that the National IV standard heavy truck's nitrogen oxide emissions can be reduced by 30% compared with the national standard, and particulate matter can be reduced by 80%.
Shaanxi Auto Group is a well-known automobile company in China. In 2008, it ranked 13th among the top 30 auto industry in China. Cummins Inc. is the world's leading power equipment manufacturer. Its research and development of heavy-duty diesel engines is one of the company’s flagship drivers for the North American heavy-duty truck market.
The down-the-hole hammer (pneumatic impactor) cooperates with the drilling rig and the corresponding drilling tools to perform the impact rotary drilling. The DTH hammer is connected to the bottom end of the drill pipe, the drilling rig drives the drill pipe to rotate, and the compressed air (compressed air) enters the DTH hammer through the drill pipe to generate a certain frequency of impact force to break the rock, and at the same time use the exhaust gas to compress the hammer. The head (drill) is cooled, and the chipped cuttings are discharged out of the hole. Because the outer diameter of the down-the-hole hammer is smaller than the diameter of the drill hole, it can go down into the hole with the deepening of the drill hole (the name of the down-the-hole hammer comes from this).
Dth Hammers ,Dth Hammer Drilling,Dth Drilling,Dth Drill Bits
Gansu Lanzhou and Wuwei International Land Port Management and Operation Co.Ltd. , https://www.gslwyygs.com